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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Suplementa??o alimentar de matrizes em pasto diferido:desempenho de ovelhas e cordeiros at? o desmame / Feed supplements in deferred pasture matrices: performance of sheep and lambs until weaning

Campos, Nath?lia Rafaela Fidelis 20 February 2017 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-09-05T19:45:51Z No. of bitstreams: 1 NathaliaRafaelaFidelisCampos_DISSERT.pdf: 1306150 bytes, checksum: 7777cbe027762ca03201c89165375936 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-09-15T21:29:08Z (GMT) No. of bitstreams: 1 NathaliaRafaelaFidelisCampos_DISSERT.pdf: 1306150 bytes, checksum: 7777cbe027762ca03201c89165375936 (MD5) / Made available in DSpace on 2017-09-15T21:29:08Z (GMT). No. of bitstreams: 1 NathaliaRafaelaFidelisCampos_DISSERT.pdf: 1306150 bytes, checksum: 7777cbe027762ca03201c89165375936 (MD5) Previous issue date: 2017-02-20 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Objetivou-se avaliar a influ?ncia da suplementa??o alimentar sobre o desempenho de ovelhas e cordeiros mantidos em pasto diferido durante o ter?o final de gesta??o at? o desmame. O experimento foi conduzido na ?rea experimental do Grupo de Estudos em Forragicultura (GEFOR), localizado no Campus Maca?ba da Universidade Federal do Rio Grande do Norte ? UFRN, no per?odo de 30 de dezembro de 2015 a 19 de junho de 2016. Foram utilizadas 55 matrizes, sem padr?o racial definido, com m?dia de 120 dias de gesta??o no in?cio do experimento. Foram gerados 61 cordeiros, provenientes de partos simples e gemelares. As matrizes foram distribu?das de forma aleat?ria em tr?s tratamentos: suplementa??o com mistura m?ltipla e suplementa??o concentrada a 0,4% e 0,8% do peso vivo. As matrizes permaneceram em pasto diferido de Brachiaria brizantha cv. Marandu em per?odo diurno, sendo recolhidas a baias coletivas onde recebiam os suplementos. O desempenho das matrizes foi avaliado por meio do peso vivo, sendo medidos ganho m?dio di?rio e ganho de peso total. O desempenho das crias foi avaliado a partir do peso ao nascer, com pesagens semanais at? a idade de 90 dias (idade de desmame). Foi poss?vel acompanhar o ganho de peso m?dio di?rio (GMD) e o ganho de peso total (GT). As medidas biom?tricas foram iniciadas aos 30 dias de idade, quinzenalmente, at? 90 dias de idade de cada cria. Houve efeito (P<0,05) da suplementa??o alimentar e do tipo de parto no peso vivo ? pari??o das matrizes. Ovelhas suplementadas com concentrado em n?vel de 0,8% do peso vivo tiveram as menores perdas de peso que aquelas suplementadas com concentrado em n?vel de 0,4% e mistura m?ltipla. Houve efeito (P<0,05) da suplementa??o alimentar da matriz, do sexo da cria, do tipo de parto e da ra?a do reprodutor sobre o peso vivo da cria, ao nascimento, aos 30, 60 e 90 dias de idade. As vari?veis apresentadas causaram efeito (P<0,05) no GMD e no GT dos cordeiros do nascimento ao desmame. As medidas biom?tricas dos cordeiros sofreram efeito significativo (P<0,05) da suplementa??o alimentar da matriz e do tipo do parto, simples ou gemelar. A utiliza??o de suplementa??o concentrada em n?vel de 0,4% do peso vivo possibilita melhores ?ndices produtivos e reprodutivos para ovelhas mantidas em pasto diferido. Cordeiros cujas m?es recebem suplementa??o concentrada em n?vel de 0,4% do peso vivo apresentam melhor desenvolvimento e crescimento, al?m de maior viabilidade para o sistema de produ??o. / The objective of this study was to evaluate the influence of food supplementation on performance of ewes and lambs kept in deferred pasture during the final third of gestation until weaning. The experiment conducted in the experimental area of the Study Group in Forage (GEFOR) located in the Campus Maca?ba the Federal University of Rio Grande do Norte (UFRN), from December 30, 2015 to June 19, 2016. Used 55 matrices, with no defined racial pattern, with an average of 120 days of gestation at the beginning of experiment. 61 lambs were generated from of birth single and twin. The matrices randomly distributed in three treatments: multiple mixture supplementation and concentrated supplementation at 0.4% and 0.8% of the live weight. The matrices remained in deferred pasture of Brachiaria brizantha cv. Marandu in the daytime, collected at collective bays where the supply of supplements occurred. The performance of the matrices evaluated from the live weight, average daily gain and total weight gain. The performance of the offspring evaluated from the birth weight, with weekly weighing up to the age of 90 days (weaning age). Thus, it was possible to follow the average daily weight gain (GMD) and the total weight gain (GT). The biometric measurements started at 30 days of age and biweekly until reaching 90 days of age. There was an effect (P <0.05) of feed supplementation and type of calving in live weight at calving. Sheep supplemented with 0.8% live weight concentrate had the lowest weight losses than those supplemented with 0.4% concentrate and multiple blend. There was an effect (P <0.05) of the food supplementation of the mother, the sex of the lamb, the calving type and the breed of the breeder on the live weight of the lamb at birth at 30, 60 and 90 days of age. The variables presented had an effect (P <0.05) on GMD and GT from lambs from birth to weaning. The biometric measurements of the lambs had a significant effect (P <0.05) of the dietary supplementation of the matrix and the type of delivery, single or twin. The use of concentrated supplementation at a level of 0.4% of live weight allows better productive and reproductive indexes for ewes kept in deferred pasture. Lambs whose mothers receive concentrated supplementation at a level of 0.4% of live weight present better development and growth, as well as greater viability for the production system.

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